CN1952838A - Overheat indicating circuit for mainboard - Google Patents
Overheat indicating circuit for mainboard Download PDFInfo
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- CN1952838A CN1952838A CN 200510100578 CN200510100578A CN1952838A CN 1952838 A CN1952838 A CN 1952838A CN 200510100578 CN200510100578 CN 200510100578 CN 200510100578 A CN200510100578 A CN 200510100578A CN 1952838 A CN1952838 A CN 1952838A
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- circuit
- mainboard
- light emitting
- emitting diode
- indicating circuit
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Abstract
This invention relates to main board overheat indication circuit, which comprises one function chip and one temperature control chip connected with function chip, wherein, the said main board also comprises one switch circuit and one light diode; the said switch circuit input end connects the said temperature control chip to receive one impose signals; the said switch circuit output end is connected with one first high level and its light diode cathode; the said light diode anode is connected to one second high level.
Description
[technical field]
The invention relates to a kind of indicating circuit, refer to a kind of indicating circuit that causes computer glitch because of mainboard is overheated of indicating especially.
[background technology]
Computer in use occur to crash through regular meeting, and the performance during deadlock mostly is the display blue screen, can't start-up system, and video freezing is reactionless, and mouse, keyboard can't be imported, and the improper interruptions of running software etc. make the operator rather worried.The reason that causes computer occur to crash has a lot, as dispel the heat bad, equipment does not match, hard disk failure, virus infections, system file are corrupted or deleted, illegal operation or the like.When crashing appearred in computer, it was which kind of reason causes that the user can not determine the end usually, and the phenomenon that causes crashing frequently takes place, and but can not in time make corresponding counter-measure at different deadlock reasons, to improve the operation conditions of computer.
Along with making rapid progress of computer technology development, present computer operation speed is highly improved, and correspondingly, the heat that computer inside is produced is also far above the past, if the cooling system of computer can not in time distribute heat, will cause computer crash even shutdown automatically.At this moment, if do not have clear and definite indication explanation to crash or the shutdown phenomenon is overheated and cause by computer main board, the user just can only handle according to the program of habitually practising, and successively possible reason is got rid of.This has not only wasted user's quality time, also brings unnecessary trouble for processing procedure.
[summary of the invention]
In view of above content, be necessary to provide a kind of overheated indicating circuit that causes computer glitch of mainboard of indicating.
A kind of overheat indicating circuit for mainboard, it comprises that a functional chip and is connected to the temperature control chip of described functional chip, described overheat indicating circuit for mainboard also comprises an on-off circuit and a light emitting diode, the input end of described on-off circuit is connected to described temperature control chip and from wherein receiving a pulse signal, the output terminal of described on-off circuit is connected in the negative electrode of one first high level and described light emitting diode simultaneously, and the anode of described light emitting diode is connected in one second high level.
Compared to prior art, overheat indicating circuit for mainboard of the present invention has increased by a control light emitting diode and has replaced luminous on-off circuit, when overtemperature shutdown appears in system, described the opening of described temperature control chip control stated on-off circuit disconnection or conducting, extinguish or light thereby control this light emitting diode, to remind the user computer guilty culprit.
[description of drawings]
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the principle of work block scheme of the utility model overheat indicating circuit for mainboard preferred embodiment.
Fig. 2 is the physical circuit figure of on-off circuit among Fig. 1.
Fig. 3 is the connecting circuit figure of connector and light emitting diode among Fig. 1.
Fig. 4 is the physical circuit figure of another preferred embodiment of on-off circuit among Fig. 1.
[embodiment]
See also Fig. 1 to Fig. 3, the preferred embodiment of the utility model overheat indicating circuit for mainboard comprises central processing unit (CPU) chip of being located on the mainboard 10, one monitoring temperature chip 20, one on-off circuits, 30, one connectors 50 and a light emitting diode (LED) 60 that is connected on this connector 50.
Described temperature control chip 20 is connected in the temperature control pin of described cpu chip 10, when the temperature of CPU exceeds the ultimate temperature of default, crashing or the situation of shutting down automatically appears in computer system, and this moment, cpu chip 10 issued a signal transmitted to described temperature control chip 20.Described temperature control chip 20 receives the input end that promptly produces a pulse signal by pin PWRLED behind this signal and be sent to described on-off circuit 30.
Described on-off circuit 30 comprises a switching device 31, first preferred embodiment of described switching device 31 is a positive-negative-positive triode, be connected one first resistance R 1 between the input end of the base stage of described triode 31 and described on-off circuit 30, the grounded emitter of described triode 31, collector is connected to one+5V power supply by one second resistance R 2, and is connected in the pin 4 of described connector 50 simultaneously.
The pin two of described connector 50 is connected to one+5V power supply by one second resistance R 2, and the anode of described light emitting diode 60 is connected to described pin two, and negative electrode is connected to the pin 4 of described connector 50.
In the present embodiment, described connector 50 is that described light emitting diode 60 is connected with computer main board and is provided with for convenience.The anode of described light emitting diode 60 can directly be connected to described+5V power supply by described the 3rd resistance R 3, and negative electrode can be directly connected in the output terminal of described on-off circuit 30, the collector of promptly described positive-negative-positive triode 31.
When the temperature of CPU exceeds the ultimate temperature of default, described temperature control chip 20 sends a high-low level and replaces the input end of the pulse signal of appearance to described on-off circuit 30, when described pulse signal is high level, described positive-negative-positive triode 31 ends, this moment described diode 60 anode and negative electrode all with+5V high level connection, therefore described diode ends, and is not luminous; When described pulse signal was low level, the pin 4 of connector was also sent into this low level in described positive-negative-positive triode 31 conductings, and the negative electrode of promptly described diode 60 is luminous because of producing a forward voltage drop conducting between the anode of described diode 60 and negative electrode at this moment.The high-low level that described temperature control chip 20 produces alternately occurs, and therefore described diode 60 also produces the luminescence phenomenon alternately that flickers, and is by the overheated initiation of mainboard thereby remind user's computer glitch.
Fig. 4 is second preferred embodiment of described on-off circuit, the difference of itself and first preferred embodiment is: described switching device 31 ' is a P-channel enhancement type field effect transistor, the grid of described field effect transistor 31 ' is connected to the output terminal of described temperature control chip 20, the grounded drain of described field effect transistor 31 ', source electrode is connected to one+5V power supply by one second resistance R 2, and is connected in the pin 4 of described connector 50.Its principle of work is identical with first preferred embodiment.
Wherein, in the foregoing description, described cpu chip 10 can be other chip with similar functions.
Claims (8)
1. overheat indicating circuit for mainboard, it comprises that a functional chip and is connected to the temperature control chip of described functional chip, it is characterized in that: described overheat indicating circuit for mainboard also comprises an on-off circuit and a light emitting diode, the input end of described on-off circuit is connected to described temperature control chip and from wherein receiving a pulse signal, the output terminal of described on-off circuit is connected in the negative electrode of one first high level and described light emitting diode simultaneously, and the anode of described light emitting diode is connected in one second high level.
2. overheat indicating circuit for mainboard as claimed in claim 1, it is characterized in that: described overheat indicating circuit for mainboard also comprises a connector, described connector comprises one first pin and one second pin, described first pin is connected to described first high level, and described second pin is connected to the output terminal and described second high level of described on-off circuit simultaneously.
3. overheat indicating circuit for mainboard as claimed in claim 2 is characterized in that: the anode of described light emitting diode is connected to first pin of described connector, and the negative electrode of described light emitting diode is connected to second pin of described connector.
4. overheat indicating circuit for mainboard as claimed in claim 1, it is characterized in that: described on-off circuit comprises a positive-negative-positive triode, the output terminal of described temperature control chip is connected to the base stage of described positive-negative-positive triode, the grounded emitter of described positive-negative-positive triode, collector are connected to the negative electrode of described light emitting diode.
5. overheat indicating circuit for mainboard as claimed in claim 4 is characterized in that: described on-off circuit comprises that also one is series at first resistance between described temperature control chip output terminal and the described positive-negative-positive transistor base.
6. overheat indicating circuit for mainboard as claimed in claim 1, it is characterized in that: described on-off circuit comprises a P-channel enhancement type field effect transistor, the output terminal of described temperature control chip is connected to the grid of described P-channel enhancement type field effect transistor, the grounded drain of described P-channel enhancement type field effect transistor, source electrode are connected to the negative electrode of described light emitting diode.
7. overheat indicating circuit for mainboard as claimed in claim 1 is characterized in that: be provided with one second resistance between the output terminal of described on-off circuit and described first high level, be provided with one the 3rd resistance between the anode of described light emitting diode and described second high level.
8. overheat indicating circuit for mainboard as claimed in claim 1 is characterized in that: when the temperature of described functional chip exceeded the temperature of computer system setting, the output terminal of described temperature control chip produced described pulse signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101005785A CN1952838B (en) | 2005-10-21 | 2005-10-21 | Overheat indicating circuit for mainboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101005785A CN1952838B (en) | 2005-10-21 | 2005-10-21 | Overheat indicating circuit for mainboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1952838A true CN1952838A (en) | 2007-04-25 |
| CN1952838B CN1952838B (en) | 2012-03-14 |
Family
ID=38059204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005101005785A Expired - Fee Related CN1952838B (en) | 2005-10-21 | 2005-10-21 | Overheat indicating circuit for mainboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1952838B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102999096A (en) * | 2011-09-14 | 2013-03-27 | 鸿富锦精密工业（深圳）有限公司 | Computer and main board and test card of computer |
| CN107332208A (en) * | 2016-04-29 | 2017-11-07 | 华为技术有限公司 | A kind of protection circuit, mainboard guard method and terminal |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW539169U (en) * | 2002-04-04 | 2003-06-21 | Antec Inc | Air blower with lighting effect |
| CN2631184Y (en) * | 2003-07-17 | 2004-08-04 | 上海精密科学仪器有限公司 | LED drive circuit |
| CN1591351A (en) * | 2003-09-01 | 2005-03-09 | 联宇光通科技股份有限公司 | Computer system monitor |
| CN2731561Y (en) * | 2004-10-13 | 2005-10-05 | 七盟电子工业股份有限公司 | Failure warning system of radiator fan |
-
2005
- 2005-10-21 CN CN2005101005785A patent/CN1952838B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102999096A (en) * | 2011-09-14 | 2013-03-27 | 鸿富锦精密工业（深圳）有限公司 | Computer and main board and test card of computer |
| CN102999096B (en) * | 2011-09-14 | 2016-03-30 | 中山市云创知识产权服务有限公司 | Computing machine |
| CN107332208A (en) * | 2016-04-29 | 2017-11-07 | 华为技术有限公司 | A kind of protection circuit, mainboard guard method and terminal |
| CN107332208B (en) * | 2016-04-29 | 2019-08-27 | 华为技术有限公司 | A kind of protection circuit, mainboard guard method and terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1952838B (en) | 2012-03-14 |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120314 Termination date: 20141021 |
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| EXPY | Termination of patent right or utility model |